(c) LAU (Line Amplifier Unit)
The Line Amplifier Unit consists of a power supply circuit for stations, transmitting and receiving circuits for voice signal, speech path switches, BGM switches and the dial data receiving circuits.
One unit accepts up to 4 stations. A maximum of 4 LAU's can be installed.
receiving | switch | switch | transmitting |
circuit | T | R | circuit |
|
|
| |
control signal |
|
| BGM/AIIcall/Link |
|
|
| |
dial data in | dial |
| busy |
|
| ||
|
|
| |
out | receiver |
|
|
|
|
|
(d)DSM (Power Supply Module)
The Power Supply Module consists of a power supply unit for the exchange and terminals for external input and output connections. This module is attached to the mother board with a connector and can be easily detached from the exchange.
AC in |
| 5V | |
power | 18V | ||
| |||
GND | supply | 24V | |
DC in | circuit | GND | |
|
|
remote
BGM in
paging out
5
